#!/bin/bash
#
# Generate a header that defines the boot kernel.
#

KERNEL_TYPE=`uname -r | sed 's_^.*\(tape\)$_-\1_;t;s_.*__;'`
KERNEL_RELEASE=`uname -r | sed 's|tape||g'`

rpm -q kernel$KERNEL_TYPE-$KERNEL_RELEASE >/dev/null 2>&1 && KERNEL_ARCH=`rpm -q --qf '%{ARCH}' kernel$KERNEL_TYPE-$KERNEL_RELEASE 2>/dev/null` || KERNEL_ARCH=`uname -m`

OLD_KERNEL_ARCH_TYPE=`sed -n 's_^/\* Kernel type \(.*\) \*/_\1_p' /boot/kernel.h 2>/dev/null`
if [ -n "$KERNEL_ARCH" -a "$KERNEL_ARCH$KERNEL_TYPE" != "$OLD_KERNEL_ARCH_TYPE" ]; then
  TAPE='0'
  VM='0'
  case "$KERNEL_TYPE" in
  -tape) TAPE='1';;
  *) VM='1';;
  esac
  cat > /boot/kernel.h << EOF
/* This file is automatically generated at boot time. */
#ifndef __BOOT_KERNEL_H_
#define __BOOT_KERNEL_H_

/* Kernel type $KERNEL_ARCH$KERNEL_TYPE */

#ifndef __MODULE_KERNEL_$KERNEL_ARCH
#define __MODULE_KERNEL_$KERNEL_ARCH 1
#endif

#ifndef __BOOT_KERNEL_TAPE
#define __BOOT_KERNEL_TAPE $TAPE
#endif

#ifndef __BOOT_KERNEL_VM
#define __BOOT_KERNEL_VM $VM
#endif

#endif
EOF
fi